He who does not research has nothing to teach. – Proverb

He who undertakes to be his own teacher has a fool for a pupil. – Proverb

When will the public cease to insult the teachers calling with empty flattery? When will men who would never for a moment encourage their own sons to enter the work of the public schools cease to tell us that education is the greatest and noblest of all human callings? – William C. Bagley

A professor is one who talks in someone elses sleep. – W. H. Auden